Theoretical studies on the anomalous response to external fields in strongly correlated organic crystals

强关联有机晶体对外场异常响应的理论研究

• 批准号: 19740218
• 负责人: HOTTA Chisa
• 金额: $ 2.49万
• 依托单位: Kyoto Sangyo University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2007
• 资助国家: 日本
• 起止时间: 2007 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-19740218/
• 关键词: 強相関系; フラストレーション; 有機導体; 強相関; 電気磁気効果; 異常応答; 磁性; 誘電性; ディラックコーン; スピン液体; 物性理論

We studied the low-dimensional strongly correlated electronic systems, motivated by several organic systems which respond anomalously to the magnetic or electric field. Five different topics are studied ; (1) an expotic1○!+1 dimensional metal in strongly correlated electronic system on an anisotropic triangular lattice is proposed, (2) a generalized von Neumann theorem is constructed which enables to design multi-band systems with Dirac points, (3) The one-dimensional quarter-filled strongly correlated electronic system coupled to localized spins is shown to produce frustrated magnetism which respond sensitive to magnetic field, (4) the origin of an anomalous dielectric properties in the dimer Mott insulator, κ-ET_2Cu_2(CN)_3, is clarified based on the quantum electric dipole picture, (5) universal temperature dependence of field induced Tomonaga-Luttinger liquid state in one dimensional gapped spin system is proposed and examined in organic crystal, DIMPY.Thus, the strong correlation of electrons results in various exotic quantum many body states.

我们研究了低维强相关电子系统，这些系统是由几个对磁场或电场有异常反应的有机系统驱动的。研究了五个不同的主题；(1)有代表性的〇！提出了各向异性三角形晶格上强相关电子系统中的+1维金属，(2)构造了一个广义冯·诺伊曼定理，使设计具有Dirac点的多带系统成为可能，(3)一维四分之一填充强相关电子系统耦合局部自旋产生对磁场响应敏感的受挫磁，(4)二聚体Mott绝缘体异常介电性质的起源。(5)提出了一维间隙自旋体系中场诱导Tomonaga-Luttinger液相的普遍温度依赖性，并在有机晶体DIMPY中进行了检验。因此，电子的强相关性导致了各种奇异的量子多体态。

项目成果

異方的三角格子上のXXZスピン系における新奇量子液体

各向异性三角晶格XXZ自旋体系中的新型量子液体

• 发表时间: 2010
• 作者: 松岡京;堀田知佐
• 通讯作者: 堀田知佐

Dimensional tuning of electronic states under strongly frustrated interactions

强受挫相互作用下电子态的尺寸调整

• 发表时间: 2007
• 作者: 堀田 知佐;小林 晃人;浅野 建一;K.Yonemitsu;堀田知佐;K.Yonemitsu;堀田 知佐;Y.Tanaka;堀田知佐;米満賢治;C. Hotta
• 通讯作者: C. Hotta

ダイマーモット絶縁体κ-(BEDT-TTF)_2Cu2(CN)_3の誘電異常

二聚体绝缘体κ-(BEDT-TTF)_2Cu2(CN)_3的介电异常

• 发表时间: 2010
• 作者: M.Abdel-Jawad;ほか
• 通讯作者: ほか

Quantum electric dipoles in Spin liquid Mott insulator

自旋液体莫特绝缘体中的量子电偶极子

• 发表时间: 2010
• 作者: N. Tsujii;他;C.Hotta
• 通讯作者: C.Hotta

Dimensional crossover in the Ising antiferromagnet on the anisotropic triangular lattice at finite temperature

有限温度下各向异性三角晶格上伊辛反铁磁体的维度交叉

• 发表时间: 2011
• 期刊: Europhys.Lett. 93
• 作者: C. Hotta;T.Kiyota;N.Furukawa
• 通讯作者: N.Furukawa